// 引入 SDK
const crawlab = require('crawlab-sdk')
// const crawlab = {
//   saveItem: () => {},
//   close: () => console.log('close')
// }
const axios = require('axios')
const cheerio = require('cheerio')
const schoolName = '中南大学'
const baseURL = 'http://news.csu.edu.cn/'
// 这是一个结果，需要为 object 类型
// const result = {name: 'crawlab'};

;(async () => {
  crawPage(`${baseURL}/zhxw.htm`, rule)
  // 调用保存结果方法
  // await crawlab.saveItem(result);

  // // 关闭数据库连接，否则程序不会结束
  
})()

async function crawPage(url, func) {
  const { data: html } = await axios(url)
  const $ = cheerio.load(html)
  func && func($)
}

async function rule ($) {
  const res = $('.subNewList li')
  for(let i = 0; i < res.length; i++) {
    const item = $(res[i])
    const href = baseURL + item.find('a').attr('href')
    const title = item.find('a').text()
    const date = item.find('span').text().replace(/年|月/g, '-').replace(/\[|\]|日/g, '').trim()
    await crawlab.saveItem({
      time: date,
      url: href,
      title,
      schoolName
    })
  }
  const next = $('a.Next').filter(function(i, el) {
    return $(this).text() === '下页';
  }).attr('href')
  // const next = $('.Next').attr('href')
  console.log(`${baseURL}${next}`)
  if (next && next !== 'javascript:void(0);') {
    crawPage(`${baseURL}${next}`, rule)
  } else {
    await crawlab.close();
  }
}